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Actor Robert Downey Jr. gives a high-five to his "Iron Man" character during opening bell ceremonies of the New York Stock Exchange, Tuesday, April 30, 2013. Stock prices are opening mostly lower on Wall Street as weak earnings from Pfizer and other companies drag down major market averages. Downey's film, "Iron Man 3," also starring Don Cheadle and Gwyneth Paltrow, opens nationwide on May 3. (AP Photo/Richard Drew)

Actor Robert Downey Jr. gives a high-five to his "Iron Man" character during opening bell ceremonies of the New York Stock Exchange, Tuesday, April 30, 2013. Stock prices are opening mostly lower on Wall Street as weak earnings from Pfizer and other companies drag down major market averages. Downey's film, "Iron Man 3," also starring Don Cheadle and Gwyneth Paltrow, opens nationwide on May 3. (AP Photo/Richard Drew)